I have a bone spur on my right heel and suffer from Plantar Fasciitis from time to time. I typically cannot be on my feet for more than 20 minutes to an hour. I'm a wildlife photographer and need to be able to stand still for long periods of time. This has proven to be a bit too difficult with my most comfortable boots and $400 custom orthotics. I recently bought a pair of Protalus M100 inserts with the hopes that something, just something, might be better. Today; I decided to try a few hours shooting Bald Eagles. As I started to layer up for the cold, my only dilemma was what pair of socks to wear. Did you read that? Socks. What socks. No thought for the comfort of my feet- no second thoughts... at all! These inserts have more than proven their worth! Thank you, Protalus, I owe ya! You took my mind off the pain.